Outdoor Tools & Calculators
Free, practical tools for every trip — weigh your pack, dial in your base weight, estimate calories and water, time a route, and ration trail food before you head into the backcountry.
Backpack Weight Calculator
Add up everything you plan to carry and convert the total to kilograms and pounds — plus see how your loaded pack compares to your body weight so you can pack lighter before the trail
Base Weight Calculator
Subtract consumables — food, water, and fuel — from your total pack weight to find your base weight, and see whether your kit lands in the ultralight, lightweight, or traditional range
Hiking Calorie Calculator
Estimate the calories you'll burn from your body weight, pack weight, time on trail, and terrain, using MET values — a handy starting point for planning trail food and snacks
Water Needs Calculator
Work out how much water to carry from your hours on trail, exertion level, and temperature — with a hot-weather bump — so you stay hydrated without hauling excess weight
Hiking Time Calculator
Estimate how long a hike will take with Naismith's rule — one hour per 5 km plus one hour per 600 m of ascent — so you can plan your day and finish in daylight
Trail Food Calculator
Turn a daily calorie target and your food's calorie density into a packing weight — the total food to carry in grams, kilograms, and pounds for a multi-day trip